3000GT VR-4 AWD V6-2972cc 3.0L DOHC MFI Twin Turbo (1998)
<Fuel control condition>
Using Oscilloscope
(1) Run the engine at idle speed.
(2) Connect the probe to the oscilloscope pick-up point as shown in the circuit diagram and check the waveform at the drive side of each injector.
HARNESS INSPECTION
Measure the power supply voltage of the front bank injector.
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Connector: Disconnected
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Ignition switch: ON
Voltage (V): Battery positive voltage
OK: GO TO STEP 2
NG: Repair the harness. (A B C1 - MFI relay)
Measure the power supply voltage of the rear bank injector.
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Connector: Disconnected
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Ignition switch: ON
Voltage (V): Battery positive voltage
OK: GO TO STEP 3
NG: Repair the harness. (D1 - MFI relay)
Check for an open-circuit, or a short-circuit between the front bank injector and the engine control module.
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Injector connector: Disconnected